Safety lock for logging hooks



June 5, 1923. H,457,%7

o. MICKELSON SAFETY LOCK FOR LOGGING HOOKS Filed Nov. 1, 1922 Patented.lnne 5, 1923.

l -ti as? n.

SAFETY LOCK ,ron ro'eeine HOOKS.

Application filed November 1, 1922. Serial No. 598,406.

T 0 all whom it may concern.

Be it known that I, OLE M'IOKELSON, a citizen of the United States,residing at Hoquiam, in the county of Grays Harbor and State ofWashington, have invented a new and useful Safety Lock for Logg ngHooks, of which the following is a specification This invention .relatesto logging hooks and more particularly to locking devices therefor.

The object of the invention is to provide a strong, cheap and eflicienthook of this character having means to close the b ll and prevent thearticle engaged by the hook from being accidently separated therefrom.

With the foregoing and other objects in' view which will appear as thedescription proceeds, the invention resides in the'combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment of the invention herein disclosed may be made within thescope of what is claimed without departing from the spirit of theinvention. In the accompanying draw1ngs:-- Figure 1 represents a sideelevation ofa logging hook equipped wlth one form of this invention. Y

Fig. 2 is a top plan view therof with the lock shown in operativeposition.

Fig. 3 is a side elevation showing another form of the inventionapplied. r

Fig. 4 is a plan View of the form shown in Fig. 3 with the lock inoperative posit on.

Fig. 5 is a side elevation showlng still another form of the invention.

Fig. 6 is a plan view therof.

Fig. 7 is the side elevation of still another form of the invention.

Fig. 8 is a top plan view thereof, and

Fig. 9 is a transverse section through the locking pin.

In the embodiment illustrated in Figs. 1 and 2, a clevis C having theusual apertured arms to receive a connecting pintle which is here shownat 5.

The logging or butt hook 1 has the usual shank 2 provided at its free orouter end with an eye 3 for the passage therethrough of the pintle 5which connects the hook with the clevis. The bill 4 of the hook is shownspaced from the connection of the hook with the clevis a sufiicientdistance to permit a logging chain or a tag line to be inserted.

The pintle' '5 is here shown-provided at the end adjacent the hill '4 ofthe hook with an enlarged disk-like head 6 having fa recess 7 in itsperimeter which is designed .to be turned into register with the hill 4of the hook when it is desired to release the hook from the tag line.The turning of'the disk 6 into the position .shown in Fig. 2, will closehook 1 and prevent all possibility of the tag line or logging chainwhich is connected therewith from being accidently disengaged, the pullwhich is exerted on clevis C being in a direction opposite to that exerted on the hook I so that the pintle 5 is held against turning thuspreventing .all possibility of the recessed disk 6 turning to bring therecess 7 into register with bill-it and thereby release the tag line.When the strain is relieved on the clevis and hook, obviously thepintle5 may be freely turned to bring the recess in the disk 6 opposite thebill 4 of the hook to permit the tag line to be taken .out. I i

WVhile this hook is designed primarily for use on the tag line of alogging apparatus, obviously itmay be used forany other purpose,

In logging operations employing speedy, donkey engines, there are twolines used, one being .the main line which hauls the log in to thelanding, and the o'the'r the haulbac'k which takes the main line backinto the C of this hook is engaged. Thebill l of the hook is designed tobe engaged with what is known as a choker which is a cable or chain thatencircles the log to be manipulated. In steep and rough country, it isoftentimes very difficult to prevent the choker from slipping off thebutt hook and it is to overcome this difliculty that this invention isdesigned.

In the form shown in Figs. 3 and 4, the clevis C is substantially thesame as that shown in the other figures and is designed to be used forthe same purpose. The hook 1 used in this form is substantially the sameas that shown in the other figures, the difference in this structurebeing that the locking disk, instead of constituting the head of theconnecting pintle 5, is made separate and loosely mounted on the pintlebetween the clevis and the eye 3" of the hook.

The locking disk 9 which is mounted on the pintle 5 has a recess 7 inits perimeter I which is'designed when turned into register I with thebill 41? ofthe" hook to release the'tag line, and when said disk isrotated to place this recess out of register, the pull exerted on theclevis and the hook will prevent rota tionof the disk and securely closethe hook against disengagement.

In the form shown'in Figs; and 6, the

structure is substantially the same as that shown in Figs. 3 and 4except that the hook 1 is arranged in a plane at right anglesto 7 thatshownin the other figures so that the disklO is in the same plane asthehook and is equippedwith a recess 11 in its periphery to registerwiththe bill ofthe hook when it is desired to release the tag line.

f In the form shown in Figs. 7 and 8, the

-- hook. 1 has the billet thereof twisted or deflected laterally as;shown clearly in Fig. 7 to position it adjacent the disk-like head 12off-the pintle13 which connects the eye of i the hook wih the clevis C.This disk-like head 12 is recessed as shown at 14, which recess isdesigned to be positionedopposite the bill Pofthe hook when the tag lineor other object engaged by the hook is to be released.

'An auxiliary lock'for the disk 12 is shown in the forinof a pin 15which is loosely mountdown into position to the hook 1 to prevent ed "inthe disk 12 and is designed to drop t rning of the disk so' that therecess 14 therein will not register with the bill of the hook until thispin is I lateral extension "17 opening through one side wall of-theaperture of the disk in which lifted. This pin 15 is provided with alongitudinally extending key 16 which lies in a 1;, the p'n is mountedsoas to prevent turning .ofthe pin.

I This pin 15 has ahead18 at one end and its otherend may be equippedwith any suitablemean's forpreventing the witl1 drawalof the pin, itbeing preferably upset for thispurpose.

' Fro'm'the above vious that the various forms of' locks shown will allreliably close the entrance" to the engagethe shank of 1 description twill be 'obr hook and prevent disengagement therefrom V of the articleheld thereby."

I claim:-- l; A butt hook forlogging'apparatus hav ing a shank with aneye at one end and a bill at the other, a pintle to extend through thehead having a recess in its periphery adapted when the pintle is turneda predetermined distance to register with the bill of the hook toprovide for the application and release of the article tobeengaged bythe ho i 3. A hook of the class described compristle to be mounted insaid eye and having a disk-like head fixed one end'to be positionedadjacent the bill of the, hook,v said head having the recess in itsperiphery adapted when the pintle is turned a predetermined distance toregister with the bill of the.

hook to provide for the application and releaseofthearti-cle to beengagedby the hook, said disk-like head having a! pin loosely mountedtherein to 'drop into enga e-1 ment with the shank of thehook to preventturning of the "pintle' beyond a l predetermined point.

: In testimony that I claiinjthe foregoing as ing a shank with an eye.at,, one;end, a pin:

my own, I have hereto affixed my signature 1 in the presence of twowitnesses.

Witnesses; e

J. A. FAIRBAIBN," W. W. WEL s,

,oLE IoKELsoN.

